| burst forming unit | <haematology> A bone marrow stem cell lineage detected in culture by its mitotic response to erythropoietin and subsequent erythrocytic differentiation in about 12 mitotic cycles into erythrocytes. (18 Nov 1997) |
|---|---|
| capon-comb unit | Amount of androgen needed to produce an increase in the capon comb surface of 20%. Synonym: capon-comb unit. (05 Mar 2000) |
| capon unit | Amount of androgen needed to produce an increase in the capon comb surface of 20%. Synonym: capon-comb unit. (05 Mar 2000) |
| vegetation unit | A patch, grouping or zone of plants evident in overall plant cover, which appears distinct from other such units because of the vegetation's structure and floristic composition, a given unit is typically topographically distinct and typically has a rather uniform soil, except possibly for relatively dry microsites (for example, tree bases, old tree stumps, mosquito ditch spoil piles and small earth hummocks) in an otherwise wet area or relatively wet microsites (for example small depressions) in an otherwise dry area. (09 Oct 1997) |
| cat unit | The dose of a drug (per kilogram of body weight of cat) which is just large enough to kill a cat when administered intravenously; was applied in the standardization of digitalis materials. (05 Mar 2000) |
| vitamin A unit | The specific biologic activity of 0.3 ug of vitamin A (alcohol form). See: Sherman-Munsell unit. (05 Mar 2000) |
| vitamin B1 hydrochloride unit | The antineuritic activity of 0.003 mg of the standard crystalline vitamin B1 hydrochloride. Synonym: vitamin B1 hydrochloride unit. (05 Mar 2000) |
| vitamin B2 unit | Potency usually expressed in terms of weight of pure riboflavin. See: Sherman-Bourquin unit of vitamin B2. Synonym: vitamin B2 unit. (05 Mar 2000) |
| vitamin B6 unit | Potency expressed in terms of weight of pure crystalline pyridoxine. (05 Mar 2000) |
| vitamin C unit | The vitamin C activity of 0.05 mg of the standard crystalline levoascorbic acid; 1 mg of crystalline vitamin C provides 20 USP unit's. See: Sherman unit. (05 Mar 2000) |
| vitamin D unit | The antirachitic activity contained in 0.025 ug of a preparation of crystalline vitamin D3 (activated 7-dehydrocholesterol). See: Steenbock unit. (05 Mar 2000) |
| vitamin E unit | Potency usually expressed in terms of weight of pure alpha-tocopherol. (05 Mar 2000) |
| vitamin K unit | See: Dam unit. (05 Mar 2000) |
| centimeter-gram-second unit | <unit> An absolute unit of the centimeter-gram-second system. (05 Mar 2000) |
| volume unit | A unit of a logarithmic scale for expressing the power level of a complex audio-frequency electrical signal, such as that transmitting music or speech; the power in volume unit's equals the decibels of power above a reference level of one milliwatt, as measured with an appropriate meter. (05 Mar 2000) |